42results about How to "Little change in quality" patented technology

The invention discloses a tower frame door opening of a wind generating set and a design method of the tower frame door opening; the tower frame door opening consists of two straight line segments and a curve segment according to shape, and the curve segment consists of more than three circular arcs with different diameters. The thickness of a door frame of the tower frame door opening is 1.15 to 1.17 times of the thickness of a tower tube wall preferentially, the length of the door frame along the radial direction of a tower tube is 4.5 to 5.5 times of the thickness of the door frame preferentially, and the length of the door frame at the central height position of the door opening, which extends out of the tower tube wall, is about half of the length of the door frame along the radial direction of the tower tube. The actual design process of the tower frame door opening comprises an overall data design of a door frame section, a door frame section modeling, a stress concentration factor IIW (International Institute of Welding) interpolation calculation and the like. Firstly, obtain an optimized parameter of the shape of the curve segment at the door opening, secondly, based on the optimized parameter, perform a further optimization to a size parameter of the door frame. The tower frame door opening increases the mechanical property index and reduces the impact of the existing door opening on a tower tube structure.

The invention discloses a method for preserving litchi by using plant essential oil. The method comprises the following steps: selecting the litchi fruit which is harvested in sunny day, 80%-90% matured, and free from mechanical damage and diseases and insect pests; soaking the litchi fruit in a 25-500 mu L / L of citral or clove leaf oil solution for 0.5-5 minutes; and then precooling, packing andstoring the soaked litchi fruit, wherein after harvesting, the litchi fruit disease mainly comprises fugus diseases such as peronophythora litchi, sour rot, anthracnose and the like, and enzymatic browning of the phenolic compounds and the degradation / discoloration of the anthocyanin are one of the main reasons causing the peel browning. In the method, the litchi fruit which is harvested in proper time and good in state is soaked in the citral or clove leaf oil solution so as to effectively inhibit the fruit rot and the peel browning of the litchi fruit and maintain the quality of the fruit; and in a low temperature condition, the litchi fruit treated by the method disclosed by the invention in completely good condition is more than 95% after 30 days, the control to the peel browning is good, and the original quality of the fruit can be basically maintained.

Disclosed is a Ni-based single crystal superalloy having a composition consisting of, in mass percent, 5.0-7.0% of Al, 4.0-8.0% of Ta, 0-2.0% of Mo, 3.0-8.0% of W, 3.0-8.0% of Re, 0-0.50% of Hf, 3.0-6.0% of Cr, 0-9.9% of Co, 1.0-14.0% of Ru, 0.1-4.0% of Nb and the balance of Ni and unavoidable impurities. The present invention provides a Ni-based single crystal superalloy which suppresses the precipitation of the TCP phase at high temperatures, improves strength at high temperatures, and has oxidation resistance at high temperatures. The inventon aims to provide a Ni-based single crystal superalloy of high performance in strength and oxidation resistance at high temperatures, and further aims to provide a Ni-based single crystal superalloy having sufficient characteristic in a ''heat treatment window'' of not being negligent at the practical aspect.

The present invention discloses a high dietary fiber cereal food and a preparation method thereof, and belongs to the technical field of deep processing of agricultural products. The high dietary fiber cereal food comprises, by weight, 30-50% of wheat, 10-30% of oats, 3.5-10% of rice, 0-15% of corn, 0-10% of buckwheat, 0-10% of soybean, 3.5-10% of fruit and vegetable powder, 3-8% of a binder, 2-5% of a barley malt extract, and 2-5% of a water-soluble dietary fiber supplement. The preparation method comprises: (1) preparing powder; (2) blending a slurry; (3) drying; (4) grading; and (5) packaging. According to the present invention, the diverse requirements of people on the cereal food can be met, the high dietary fiber cereal food has characteristics of reasonable cereal matching, high fiber content, unique flavor and crisp taste, is further added with the water-soluble dietary fiber supplement with the prebiotic effect, and can be adopted as the food ingredient and the substitute cereal food; and the preparation method is simple, the cost is low, and the industrial production requirements can be met.

PROBLEM TO BE SOLVED: To solve the problems that the conventional batch type kneader and the like raises, problems of the restricted production scale, consumption of much electric energy, insufficient transparency of the obtained pigment and the like.SOLUTION: The manufacturing method of the pigment composition comprises kneading a mixture that consists of an organic pigment, a water-soluble inorganic salt, a water-soluble organic liquid and a resin in a continuous kneading machine that has pulverizing spaces formed in the gap parts between the annular fixed disks and the rotating disks that are concentric with the fixed disks that rotate as one body around the axial center of the driving shaft.

The invention relates to the field of ceramic materials, in particular to a silicon carbide ceramic and a preparation method thereof. The preparation method of the silicon carbide ceramic provided bythe invention comprises the following steps: step one, mixing silicon carbide powder, aluminum oxide powder and Re2O3 powder to obtain silicon carbide-aluminum oxide-Re2O3 mixed powder; step two, mixing the silicon carbide-aluminum oxide-Re2O3 mixed powder with tantalum diboride powder to obtain silicon carbide-aluminum oxide-Re2O3-tantalum diboride mixed powder; and step three, pelleting and sintering the silicon carbide-aluminum oxide-Re2O3-tantalum diboride mixed powder to obtain the silicon carbide ceramic. The silicon carbide ceramic solves the technical problem that the oxidation resistance is reduced due to the fact that a silicon dioxide protective film generated after a liquid-phase sintered silicon carbide ceramic is oxidized in the prior art is broken. The silicon carbide ceramic obtained by the method is high in compactness and high in oxidation resistance, and can be widely applied to the fields of mechanical engineering, chemical engineering, micro-electronics, automobiles, petroleum, processing and the like.

The invention discloses an acid and alkali resistant rubber material, made from special rubber, reclaimed rubber, porous powder quartz, carbon black, a titanate coupling agent, organic silicon resin, sulfur, a flow modifier, and a catalyst. Compared with the prior art, the acid and alkali resistant rubber material has the advantages that the reclaimed rubber good in impact resistance is combined with the special rubber, the impact resistance of the material is enhanced while acid and alkali resistance and ageing resistance of the special rubber are maintained, a rubber product made by mixing the material with other materials in a high-temperature environment is good in high temperature resistance, the weight of the rubber product after being corroded by acid and alkali has slight change, tensile strength bears low impact, and acid and alkali resistance is good; as the reclaimed rubber and the porous powder quartz are used, production cost is greatly reduced and the material is suitable for popularization and application.

The invention relates to a method for reducing the content of heavy metal ions such as arsenic and lead in instant tea. The method comprises the steps of preparing a concentrated solution in mass concentration of 5 to 15 percent by virtue of steps including extraction, centrifuging, filtering, concentration and the like, adsorbing tea polyphenol of the concentrate solution by virtue of a resin column which is filled with LX-8 macroporous adsorption resin, adsorbing heavy metal ions including arsenic, lead and the like in the column passing solution by virtue of a resin column which is filled with chelating resin LSA-100, collecting an elution solution of LX-8 resin and a column passing solution of LSA-100, uniformly mixing the elution solution and the column passing solution to obtain a mixed solution, concentrating and drying the mixed solution, and preparing the instant tea powder with low heavy metal content. The removal rate of the heavy metal ions such as the arsenic and lead in the instant tea powder processed in the method can reach 50 percent, the loss rate of the tea polyphenol is less than 5 percent, the operation is simple, the original quality of the instant tea is maximally reserved, the heavy metal removal effect is obvious, the restriction of the raw material for producing the instant tea can be broken through, the selection range of the raw material is enlarged, and the safety and the market competence of the instant tea product can be improved.

The invention discloses a method for distinguishing the infrared radiation absorption characteristics of cereals and pests. The method can be used to rapidly and conveniently acquire infrared radiation wavelength parameters of the cereals and the pests so as to determine an optimal band for infrared disinfestation. The method for measuring infrared characteristics of the cereals and the stored grain pests comprises the following steps: 1, preparing a sample; 2, measuring and scanning the cereals and the pests by adopting a Fourier transform attenuated total reflection infrared spectrometer, and collecting infrared spectrograms and data of the cereals and the pests; 3, carrying out qualitative analysis on the infrared spectrogram and data of the cereals and the pests, and drawing a fingerprint infrared spectrum; 4, acquiring a wavelength range with low infrared radiation temperature and small cereal quality change according to Wien displacement law and based on the acquired infrared spectrogram, and taking the acquired wavelength range as a working wavelength range of infrared Insecticidal equipment. When an infrared radiation device works under the wavelength range condition, the occurrence of pests can be effectively reduced during storage, the original quality and taste of the cereals are maintained, and the energy consumption is low.

According to the weight percentage, a mixed asphalt comprises the components of 25-75% of lake asphalt and 25-75% of petroleum pitch; wherein the lake asphalt comprises 52-55% of asphaltic bitumen, 35-39% of ash component and 9-10% of organic volatile compound; the preparation method comprises the following steps of 1) rough machining: arranging TLA mixture into special production equipment and heating the TLA mixture to the temperature of 150-180 DEG C so as to evaporate water; 2) finish machining: screening the dissolved TLA mixture by a sieve so as to remove the sundries, finish-machining the TLA mixture as the lake asphalt, namely the TLA; 3) packaging: packaging the TLA into a special fiber can and transporting the TLA after cooling the TLA; 4) delivering and processing: mixing 25-75% (weight percentage) of the TLA lake asphalt into the substrate petroleum pitch and mixing the mixture under the temperature of 150-180 DEG C for 30-70 minutes, thus preparing the mixed asphalt. The mixed asphalt has good miscibility, good high-temperature resistance track and low-temperature anti-cracking performance, anti-ageing performance, strong adhesion and environment-protection performance.

The invention discloses an anti-tear silicone rubber compound and a preparation method thereof, and belongs to the field of chemical industry. According to a silicone rubber base material for preparation, fluorine-containing siloxane is added in a mixed rubber base material, so that oil resistance of the silicone rubber is improved, and advantage combination of the silicone rubber and a mixed rubber additive are increased. Mixed rubber filler for preparation is prepared by taking white carbon black and nano carbon tubes as raw materials, so that temperature resistance of the rubber compound isimproved, and bonding performance between the rubber compound and a the silicone rubber matrix is improved. A cross-linking additive for preparation is prepared by taking lac and fumaric acid as rawmaterials, and has relatively good tear resistance and tensile strength. Aramid fiber short fibers and aramid fiber pulp are added, so that cross-linking activity in a mixing process is improved. According to the invention, the silicone rubber base material is added to improve oil resistance, and mixed fibers are added in the mixing process, so that various properties of the rubber compound are well combined. According to the invention, the problems of poor oil resistance and poor tear resistance of existing silicone rubber are solved.

The invention discloses a magnetic suspension thermobalance measurement method based on rapid photothermal heating. The method comprises the following steps: 1) weighing and taking a measurement material into a reaction tank; 2) placing the reaction tank into a closed container together with a magnetic suspension float; 3) suspending a magnetic suspension float in the closed container by a magnetic suspension device; 4) introducing a gas into the closed container; 5) measuring the real-time position of the magnetic suspension float by a laser displacement monitoring assembly, and adjusting theposition of a magnetic suspension stator to suspend the magnetic suspension float to a measurement zero position; 6) heating the reaction tank by photothermal heating assemblies; 7) adjusting the positions of the photothermal heating assemblies to maintain a heating beam on the reaction tank; 8) measuring the temperature of the measurement material in the reaction tank; and 9) recording the displacement of the magnetic suspension float, and converting the displacement into mass. The displacement of the magnetic suspension float is measured, and is converted into material mass change, so the systematic error is reduced, and high-precision measurement of the material mass change under a temperature control condition is achieved.

The present invention relates to a method for manufacturing a handle for a hand tool, the handle comprising a body portion and a gripping part that is provided at least partly on the body portion and intended for the user to grip when using the hand tool. In the method of the invention there is first fabricated the gripping part and it is set in a mould cavity, whereafter melt mass is cast into the mould cavity to provide the body portion such that the melt mass flows underneath the gripping part, whereby the gripping part is pressed against the wall of the mould cavity.

The invention provides a method for purifying an RGD peptide containing a plurality of cysteines, the RGD cyclic peptide is characterized by containing two or more cysteines, an -RGD-sequence, and various modified peptides on such basis. A dissolving step comprises: dissolving polypeptide in a mixed solvent of water and acetonitrile to obtain a polypeptide solution, and adding a small amount of reducing reagent into the polypeptide solution. A reversed-phase chromatographic column analysis step comprises connecting an RGD polypeptide solution to a reversed-phase chromatographic analysis columnfor gradient detection to obtain an analysis spectrum. Reversed-phase preparative chromatographic column adsorption and elution collection comprises setting the preparation gradient of the preparative chromatographic column according to the analysis spectrum, connecting the RGD polypeptide solution to the preparative chromatographic column for sample injection adsorption and elution collection, and implementing elution collection. A preparation mobile phase needs to be subjected to degassing and nitrogen filling. The problem that the RGD peptide tends to oxidation and isomer formation after oxidation in the purification process is solved, and products with the purity of more than 98% can be obtained.

A high-purity ultrafine particulate titanium dioxide with a reduced fluctuation of the absorbed water content whish is a large mass fluctuation factor in a fine particulate powder body, is provided. The fine particulate titanium dioxide has a BET specific surface area of 10 to 200 m2 / g, wherein when a powder of the titanium dioxide in an amount of 2 to 5 g is spread in a 10 cm-diameter glass-made Petri dish to a uniform thickness and left standing in an environment at 20oC and a relative humidity of 80% for 5 hours, the rate of change of mass before standing is from -5 mass% to 5 mass%. The process for producing the fine particulate dioxide comprise a first step of high-temperature oxidizing a titanium tetrachloride-containing gas with use of an oxidative gas to produce a titanium dioxide powder, and a second step of contacting water vapor with the titanium dioxide powder while rolling the powder in a heating furnace, thereby effecting dechlorination and at the same time, increasing the absorbed water.

A green tea beverage is prepared from the fresh organic green tea leaves through breaking, squeezing to obtain tea juice, filtering, fine filtering by membrane, mixing it with water in ratio of 1:(15-25),membrane filtering for removing bacteria, and aseptic canning. Its advantages are unique fragrance and high nutritive value.

The invention relates to a 4-carboxylphenyl retinamide ethanol compound, a preparation method thereof, and a medicinal composition and application thereof. The structural formula is shown as the specifications.

The invention discloses a cut stem preparation method capable of improving cigarette ash whiteness. The cut stem preparation method comprises the following steps: (1) carrying out elution treatment onraw material tobacco stems; (2) repairing the eluted tobacco stems by adopting glycerol so as to recover the processing resistance of the tobacco stems; and (3) removing residual glycerol on the tobacco stems, and shredding the tobacco stems to obtain the tobacco stem shreds. After the stem shreds for the cigarettes are added into the cigarettes for use, the ash whiteness of the cigarettes can beobviously improved by 15-30 units, the ash coagulation index is reduced by 1-2 units, the sensory quality of the cigarettes is slightly changed, potential safety hazards are avoided, and compared with a common process for improving the ash whiteness of the cigarettes through stem shred treatment (the breakage rate is about 10-20%), according to the method, the crushing rate can be controlled within 2-3%, and the production cost is greatly reduced.

The invention discloses a magnetic suspension thermobalance measurement method based on rapid photothermal heating. The method comprises the following steps: 1) weighing and taking a measurement material into a reaction tank; 2) placing the reaction tank into a closed container together with a magnetic suspension float; 3) suspending a magnetic suspension float in the closed container by a magnetic suspension device; 4) introducing a gas into the closed container; 5) measuring the real-time position of the magnetic suspension float by a laser displacement monitoring assembly, and adjusting theposition of a magnetic suspension stator to suspend the magnetic suspension float to a measurement zero position; 6) heating the reaction tank by photothermal heating assemblies; 7) adjusting the positions of the photothermal heating assemblies to maintain a heating beam on the reaction tank; 8) measuring the temperature of the measurement material in the reaction tank; and 9) recording the displacement of the magnetic suspension float, and converting the displacement into mass. The displacement of the magnetic suspension float is measured, and is converted into material mass change, so the systematic error is reduced, and high-precision measurement of the material mass change under a temperature control condition is achieved.

The present invention relates to a method for manufacturing a handle for a hand tool, the handle comprising a body portion and a gripping part that is provided at least partly on the body portion and intended for the user to grip when using the hand tool. In the method of the invention there is first fabricated the gripping part and it is set in a mould cavity, whereafter melt mass is cast into the mould cavity to provide the body portion such that the melt mass flows underneath the gripping part, whereby the gripping part is pressed against the wall of the mould cavity.

The invention discloses a magnetic suspension thermobalance based on rapid photothermal heating. The magnetic suspension thermobalance comprises a closed container, a reaction tank, a magnetic suspension device, a laser displacement monitoring assembly, photothermal heating assemblies and photothermal heating assembly displacing devices; a gas inlet is arranged at the upper end of the closed container, a detachable cover plate is arranged at the lower end of the closed container, the cover plate is provided with a gas outlet, a gas flow stabilizer and an infrared temperature measuring assemblyare arranged in the closed container, and the sidewall of the closed container is provided with a displacement monitoring window and a heating beam window which are made of a transparent material; the photothermal heating assemblies are arranged on the photothermal heating assembly displacing devices and can be displaced by the photothermal heating assembly displacing devices; the magnetic suspension device comprises a magnetic suspension float and a magnetic suspension stator; and the upper part of the magnetic suspension float is fixedly provided with a support frame for supporting the reaction tank. The displacement of the magnetic suspension float is measured, and is converted into material mass change, so the systematic error is reduced, and high-precision measurement of the materialmass change under a temperature control condition is achieved.

The invention relates to the technical field of cleaning equipment, and discloses a closestool cleaning agent slow release device which comprises a container used for containing a fixed cleaning agent, the container is communicated with the atmosphere, the container does not generate liquid exchange with a water tank when the water tank is full of water, and the container is communicated with the water tank through a communicating pipe. According to the slow release device for the closestool cleaning agent, the cleaning agent is dissolved in the container firstly and then quantitatively released into the water tank after each time of flushing, and due to the fact that the capacity of the container is small, although the concentration of the cleaning agent dissolved in the container is different along with time, the dissolved amount of the cleaning agent is slightly changed, Therefore, the quality change of the cleaning agent quantitatively released to the water tank is small; the concentration of the cleaning agent is relatively stable; Secondly, the cleaning agent is placed in the container; Even if the cleaning agent cannot maintain the form, the cleaning agent cannot be discharged along with the upper solution; It can be guaranteed that cleaners are all discharged into water tank in dissolved state, use of cleaners is prolonged, and waste is reduced.

The invention relates to the field of ceramic materials, in particular to a silicon carbide ceramic and a preparation method thereof. The preparation method of silicon carbide ceramics provided by the present invention comprises the following steps: Step 1: SiC powder, alumina powder, Re 2 o 3 Powder blending to SiC‑Alumina‑Re 2 o 3 Mixed powder; Step 2: Mix the SiC-Alumina-Re 2 o 3 The mixed powder and tantalum diboride powder are mixed to obtain silicon carbide-alumina-Re 2 o 3 ‑Tantalum diboride mixed powder; Step 3: mix the silicon carbide‑alumina‑Re 2 o 3 - The tantalum diboride mixed powder is granulated and sintered to obtain the silicon carbide ceramics. The invention solves the technical problem in the prior art that the silicon dioxide protective film formed after oxidation of the liquid-phase sintered silicon carbide ceramic is destroyed, resulting in a decrease in its anti-oxidation performance. The silicon carbide ceramic prepared by the method has high density and good oxidation resistance, and can be widely used in the fields of machinery, chemical industry, microelectronics, automobile, petroleum and processing.

Provided is a hose line for fresh and / or consumed dialysis fluid. It is proposed a dialysis fluid tubing for producing a fluid connection between a dialysis fluid outlet on a dialysis machine and a dialysis fluid input to a dialyzer and / or establish a fluid connection between a dialysis fluid outlet to the dialyzer and a dialysate input to the dialysis machine with at least one designed for the passage of dialysis fluid lumen of a predetermined cross-section and / or diameter, wherein the at least one lumen is arranged to provide a dialysis fluid so that a loss of temperature of the dialysis fluid path between bounded along the dialysis machine and dialyzer and a predetermined temperature accuracy of the dialysis fluid is obtained at least in the dialysis fluid inlet of the dialyzer. In one embodiment, the at least one lumen is split into at least two lumens same or different cross section and / or diameter, wherein the at least two lumens individually when subjected to dialysis liquid from a inlet side external device on the dialysis machine or can be applied in a parallel manner with a dialysis fluid, and the output side open into a single lumen at the dialyzer.

The invention provides the preparation and application of a rapid film-forming energy-saving and environmental protection machine spray fine decoration mortar. The preparation method is: mixing the solid phase change material and the liquid phase change material, heating and melting, adding antioxidants and adsorption materials, and after the adsorption is saturated, Mix evenly with thermal conductivity additives and film-forming agents, solidify and form, cool to room temperature, and obtain solid-liquid phase change materials; white cement, diatomaceous earth, emulsifier, epoxidized polybutadiene, gypsum and solid-liquid phase change materials The materials are added into water, mixed evenly, cured and molded, removed from the mold, and cured for 28 days to obtain fast film-forming energy-saving and environmental protection machine spray fine decoration mortar. The refined decoration mortar prepared by the invention has high content of phase-changing materials, excellent energy storage effect, good thermal conductivity, good dispersion with mortar, good constant temperature effect, and rapid film-forming performance of epoxy-modified polybutadiene polymer Excellent, also has waterproof and anti-corrosion, therefore, the refined decoration mortar prepared by the present invention is green and constant temperature, energy-saving and durable, safe and environment-friendly.

The invention provides a method and a device for evaluating burning loss performance of a tungsten electrode, and relates to the field of refractory metal materials. The method for evaluating the burning loss performance of the tungsten electrode comprises the following steps: (1) taking a to-be-evaluated tungsten electrode, connecting the to-be-evaluated tungsten electrode as a cathode with a direct-current power supply, connecting the to-be-evaluated tungsten electrode with a water-cooled copper anode to form a welding path, making a test current be constant, and welding in an argon atmosphere; (2) monitoring a voltage between the cathode and the anode, and when the voltage rises to a preset voltage, cutting off the test current, wherein the preset voltage is any value from 1.05 times to1.15 times of an initial voltage when arcing is stable; and (3) recording evaluation indexes, and judging, wherein the evaluation indexes include one or two of burning loss time and a quality difference of the tungsten electrode from the initial voltage to the preset voltage. The method and the device for evaluating the burning loss performance of the tungsten electrode are easy to implement, anda quality change caused by abnormal welding burning loss of the tungsten electrode can be reduced as much as possible so as to accurately judge burning loss resistance of the tungsten electrode.

The invention relates to a method for reducing the content of heavy metal ions such as arsenic and lead in instant tea. The tea leaves are extracted, centrifuged, filtered, concentrated and other processes are prepared into a concentrated solution with a mass concentration of 5-15%, and the concentrated solution is passed through the LX The resin column of ‑8 macroporous adsorption resin adsorbs tea polyphenols, and then passes the column liquid through the resin column filled with chelating resin LSA‑100 to adsorb heavy metal ions such as arsenic and lead, and collects the eluate of LX‑8 resin and LSA ‑100 resin column solution, mixed evenly, then concentrated and dried to prepare instant tea powder with low heavy metal content. The removal rate of heavy metal ions such as arsenic and lead in the instant tea powder obtained by the treatment of the present invention reaches 50%, the loss rate of tea polyphenols is less than 5%, the operation is simple, and the prepared product retains the original quality of instant tea to the greatest extent. The heavy metal removal effect is obvious, breaking through the raw material limitation of instant tea production, expanding the range of raw material selection, and improving the safety and market competitiveness of instant tea products.

The invention relates to a proscar tablet and a preparation method thereof. The proscar tablet is prepared from main drug components and various ingredient components which are subjected to processesof wet granulation, drying, granulating, total mixing, tabletting and coating. The proscar tablet does not adopt an organic solvent in the whole production process, safety in the drug production process and stability of the product quality are improved, the dissolution condition of a prepared sample is consistent with that of a reference preparation, namely a Hangzhou Merck product Proscar, quickrelease can be achieved, the operation process is simple, the proscar tablet is stable, and wide application prospects are achieved.

The invention discloses a method for treating cut stems that can improve the whiteness of cigarette ashes. The method comprises the following steps: (1) eluting cut stems; (2) using a repairing agent to repair the washed cut stems to restore Cut stems are resistant to processing strength, enabling them to be smoothly incorporated into cigarettes during normal cigarette production. After the shredded stems treated by the invention are added to cigarettes for use, the ash whiteness of the cigarettes can be improved by 15-30 units, the tuff index can be reduced by 1-2 units, and the sensory quality of the cigarettes changes little, and there is no potential safety hazard.